Segment Information (Tables)

12 Months Ended

Dec. 31, 2017

Segment Reporting [Abstract]

Geographical Segment Revenue

Revenue by geographic area, based upon the “bill-to” location, was as follows:

	Year Ended		Year Ended		Year Ended
	December 31,		December 31,		December 31,
	2017		2016		2015
Domestic	$	5,116	$	4,776	$	6,304
International (1)		20,097		17,017		15,885
Total	$	25,213	$	21,793	$	22,189

(1) Revenue from the Central Banks, consisting of a consortium of central banks around the world, is classified as international revenue. Reporting revenue by country for this customer is not practicable.

Major Customers Per Regulation S-K

Customers per Regulation S-K, Item 101(c)(1)(vii) are as follows:

	Year Ended			Year Ended			Year Ended
	December 31,			December 31,			December 31,
	2017			2016			2015
Central Banks		55	%		62	%		57	%